package com.hmdp.service.impl;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.bean.copier.CopyOptions;
import cn.hutool.core.util.RandomUtil;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.hmdp.dto.LoginFormDTO;
import com.hmdp.dto.Result;
import com.hmdp.dto.UserDTO;
import com.hmdp.entity.User;
import com.hmdp.mapper.UserMapper;
import com.hmdp.service.IUserService;
import com.hmdp.utils.RegexUtils;
import com.hmdp.utils.SystemConstants;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import javax.servlet.http.HttpSession;

import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.TimeUnit;

import static com.hmdp.utils.RedisConstants.*;

/**
 * <p>
 * 服务实现类
 * </p>
 *
 * @author 虎哥
 * @since 2021-12-22
 */
@Service
@Slf4j
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {
    @Resource
    private StringRedisTemplate stringRedisTemplate;

    @Override
    public Result sendCode(String phone, HttpSession session) {
        boolean phoneInvalid = RegexUtils.isPhoneInvalid(phone);
        if (phoneInvalid == true){
           return Result.fail("手机号格式错误");
        }
        String s = RandomUtil.randomNumbers(6);
//        session.setAttribute("code",s);
        stringRedisTemplate.opsForValue().set(LOGIN_CODE_KEY + phone,s);
       log.debug("验证码：{}",s);
        return Result.ok();
    }

    @Override
    public Result login(LoginFormDTO loginForm, HttpSession session) {
        String phone = loginForm.getPhone();
        //1.校验手机号
        if (RegexUtils.isPhoneInvalid(loginForm.getPhone())){
            return Result.fail("手机号格式错误");
        }
//        Object code = session.getAttribute("code");
//        if (code == null || !code.toString().equals(loginForm.getCode())){
//            return Result.fail("验证码错误");
//        }
        // 3.从redis获取验证码并校验
        String cacheCode = stringRedisTemplate.opsForValue().get(LOGIN_CODE_KEY + phone);
        String code = loginForm.getCode();
        if (cacheCode == null || !cacheCode.equals(code)) {
            // 不一致，报错
            return Result.fail("验证码错误");
        }
        User user= query().eq("phone", loginForm.getPhone()).one();
        if (user == null){
          user =creatUserwithphone(loginForm.getPhone());
        }
//        UserDTO userDTO = new UserDTO();
//        BeanUtils.copyProperties(user, userDTO);
//        log.info("用户信息：{}",userDTO);
//        session.setAttribute("user",userDTO);
//        return Result.ok();
        // 7.保存用户信息到 redis中
        // 7.1.随机生成token，作为登录令牌
        String token = UUID.randomUUID().toString();
        // 7.2.将User对象转为HashMap存储
        UserDTO userDTO = BeanUtil.copyProperties(user, UserDTO.class);
        Map<String, Object> userMap = BeanUtil.beanToMap(userDTO, new HashMap<>(),
                CopyOptions.create()
                        .setIgnoreNullValue(true)
                        .setFieldValueEditor((fieldName, fieldValue) -> fieldValue.toString()));
        // 7.3.存储
        String tokenKey = LOGIN_USER_KEY + token;
        stringRedisTemplate.opsForHash().putAll(tokenKey, userMap);
        // 7.4.设置token有效期
        stringRedisTemplate.expire(tokenKey, LOGIN_USER_TTL, TimeUnit.MINUTES);

        // 8.返回token
        return Result.ok(token);
    }

    private User creatUserwithphone(String phone) {
       User user = new User();
        user.setPhone(phone);
        user.setNickName(SystemConstants.USER_NICK_NAME_PREFIX + RandomUtil.randomString(10));
        save(user);
        return user;
    }
}
